[Android] Switch KillAll, StartActivity, and BroadcastIntent to DeviceUtils.

tools/android/adb_profile_chrome/controllers_unittest.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import unittest
 
 from adb_profile_chrome import profiler
 
 from pylib import android_commands
 from pylib.device import device_utils
 
 
 class BaseControllerTest(unittest.TestCase):
   def setUp(self):
     devices = android_commands.GetAttachedDevices()
     self.browser = 'stable'
     self.package_info = profiler.GetSupportedBrowsers()[self.browser]
     self.device = device_utils.DeviceUtils(devices[0])
 
-    adb = android_commands.AndroidCommands(devices[0])
-    adb.StartActivity(self.package_info.package,
-                      self.package_info.activity,
-                      wait_for_completion=True)
+    self.device.StartActivity(
+        intent.Intent(activity=self.package_info.activity,
+                      package=self.package_info.package),
+        blocking=True)